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Phys. Rev. Lett. 101, 207601 (2008) [4 pages]

Multipulse Operation and Optical Detection of Nuclear Spin Coherence in a GaAs/AlGaAs Quantum Well

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Y. Kondo1,*, M. Ono1, S. Matsuzaka1,2, K. Morita2,1,†, H. Sanada1,‡, Y. Ohno1,§, and H. Ohno1,2,**
1Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
2ERATO Semiconductor Spintronics Project, Japan Science and Technology Agency, Japan

Received 6 July 2008; published 14 November 2008

We demonstrate manipulation of nuclear spin coherence in a GaAs/AlGaAs quantum well by optically detected nuclear magnetic resonance (NMR). A phase shift of the Larmor precession of photoexcited electron spins is detected to read out the hyperfine-coupled nuclear spin polarization. Multipulse NMR sequences are generated to control the population and examine the phase coherence in quadrupolar-split spin-3/2 75As nuclei. The phase coherence among the multilevel nuclear spin states is addressed by application of pulse sequences that are used in quantum gate operations.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.207601
DOI:
10.1103/PhysRevLett.101.207601
PACS:
76.70.Hb, 78.47.jc, 78.66.Fd

*Present address: Fujitsu Laboratory Ltd., 10-1 Morinosato-Wakamiya, Atsugi-shi, Kanagawa 243-0197, Japan.

†Present address: Center for Frontier Research of Engineering, Tokushima University, 2-1 Minamijyosanjima-Cho, Tokushima 770-8506, Japan.

‡Present address: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi 243-0198, Japan.

§oono@riec.tohoku.ac.jp

**ohno@riec.tohoku.ac.jp

 
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